Posted by Tarek Tarabichi on May 14, 2013 •
“From a broadcaster’s point of view, New Year’s Day 2013 was undoubtedly celebrated Jan. 25. That is when the International Telecommunications Union announced the first-stage approval of the new video codec H.265, also known as HEVC, for high-efficiency video codec.
While some broadcast-grade HEVC encoders were disclosed during 2012, the first end-user decoders were showcased at CES 2013, about 10 days before the ITU announcement.
The new codec seeks to achieve the same video quality of the established H.264/AVC codec using just half of the bandwidth. The final figures seem to confirm initial hopes. The École Polytechnique Fédérale de Lausanne EPFL evaluated the subjective video quality of HEVC at resolutions higher than HDTV, and the study highlighted that a bit rate reduction ranging from 51 to 74 percent can be achieved based on subjective results, while reduction based on peak signal- to-noise ratio (PSNR) values was between 28 and 38 percent.
Those are two standard ways to measure the efficiency of a video coding standard. The first is based on the subjective (human) assessment of video quality. PSNR is based on an objective metric.”
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